Attachment for combustion-generators, &amp;c.



B. ILVAN AUKEN.

ATTACHMENT FOR couusnsnou GENERATORS, (Kw. APPLICATION FILED m0. 22,1910. 1 Q63,4;79, v Patented June 3, 1913.

I 3 SHEETS-SHEET 1.

' 3%5AJMM B. H. VAN AUKEII. ATTACHMENT FOR COMBUSTION GENERATORS, 8mAPPLICATION FILE DBO 22, 1910.

1,958,479, Patentea 511316 3, 1913.

3 SHEETS-SHEET 2.

WIT/V5555. [NI/ENTER B. H. VAN- AUKEN. ATTACHMENT FOR COMBUSTIONGENERATORS, &c.

. APPLICATION FILED DEC. 22, 1910. 1,0 3,479,

Patented June 3, 1913.

3 SHEETS-SHEET 3.

Altdmey UNITED sTAtrEs PATENT omen BENJAMIN H. VAN AUKEN, or R-AHWAY,NEW innsnr.

, ATTACHMENT FOR COMBUSTION-GENERATORS, &c.

Specification of Letters Patent.

Patented Juno 3, 1913.

Application filed December 22, 1910. Serial No. 598,743.

in the art to which it appertains to make and use the same, referencebeing had to the,. accompanying drawings, and to the letters and figuresof reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in combinedcombustion promotors, fuel economizers and draftcont-rollers forfurnaces of various kinds and the object in view is to produce anautomatic means whereby a constant flow of heated air may be supplied toa furnace for combustion purposes holding the gases in check orretarding their flow and at the same time afford automatic means forpreventing the escape of noxious gases from the furnace through the airsupply duct when the pressure of gases exceeds the pressure ofatmospheric air in the cellar or other compartment in which the furnacebe located. The invention consists specifically in the provision of achamber positioned within a. specially designed casing, connecting atone end to the smoke collar of furnace and at the other end to the pipeleading from the furnace to the chimney and having openings to theatmosphere controlled by automatically operated dampers, the chamberhaving increasing capacity to allovi for the expansion of the air as itis heated, the contour of the walls of the chamber being corrugated toform eddies which will cause the various particles of air to come intocontact with the radiating surface of the wall of the chamber.

The invention comprises various other details of construction andcombinations and arrangements of parts which will be hereinafter fullydescribed and then specifically defined iii the appended ,claims.

I illustrate my invention in the accompa- ",siying drawings, in whichFigure 1 is a side elevation of a smoke pipe to which my apparatus isapplied. Fig. 2 is a" central longitudinal sectional view through theform shown in Fig. 1.

. casin Fig. 3 is a sectional view taken on line 33 of Fig. 2. Fig. 4 isa sectional view on line M of Fig. 2. Fig. 5 is a section through thepipe showing the apparatus in top plan view, and Fig. 6 is a detailperspective view of one of the automatic dampers.

Reference now being had to the details of the drawings by ietter, Adesignates a casing, onev end B of which is adapted for connection withthe smoke pipe leading from a furnace, not shown, and its other end is.

gonnected to a pipe B adapted to connnunicate with a chimney. Saidcasing has an enlarged chambered portion 13 in which is positioned anair heating chamber 0 which forms a means, of communication between theoutside atmosphere and the interior of the chambered portion B of thecasing. Uponreference to the drawings, it will be noted that the airheating chamber C has two branching passageways and which, together withthe main chamber C, are of gradually increasing capacity and that eachbranching part communicates with an opening D formed in the wall of thechambered portion of the casing. A valved damper F is pivotally mountedin each of said openings to allow air to freely pass in but adapted toclose upon any back pressure from the air heating chamber. Said chamberC flares at one end as at E and shown clearly in Fig. 3 of the drawingsand is PI'OViQGd with a series of exit openings E therein through whichthe air makes exit into the interior of the chambered portion of the Itwill be noted upon reference to Fig. 2 of the drawings that the wall ofthe air heating chamber, as well as the on red compartments C thereof,is corrugated in order to afford a maximum contactheating surface whichwill be exposed to the waste heat from the products of combustion asthey pass from the furnace to the chimney and the corrugated wall isprovided for the purpose of forming eddies in the volume of incoming airwhich will have a tendency to bring the various particles of the airinto intimate contact with the radiating surface of the wall of theheating chamber thereby thoroughly heating it.

F, F designate automatically operated dampers, one mounted in eachopening D of the air chamber and each valve is providedwith a. pivotalknife edge F, which has bearing in the marginal. edges of the appa ratusG formed in the side walls of the congas damper, the pressure of whichgases would exceed the normal pressure of ithe atmospheric air in thecellar or other compartment in which the furnace is located, saiddampers will automatically close and prevent the escape through the airsupply ducts of the gases to the cellaror othergcompartment in which thefurnace is located.

Upon reference to Figs. 2 and 4 of the drawings will be seen a rockshaft, designated by letter H, to which a damper H is fixed and whichdamper is pivotally mounted in suitable bearings H. One end of said rockshaft projects through the wall of1the casing is squared as at N and hasa handoperated bar 0 fixed thereto, forming means for rocking the shaftfor the purpose of opening or closing the damper. Upon referenceto Fig.4 of the drawings, it will be noted that the upper marginal edge of thedamper is provided wit-hopenings H which are provided for the purpose ofallowing for the passage to the chimney of the in combustible portionsof the gases. Pivoted in bearings K fastened to the inner surface of thecasing B is a cold air check'damper K which, when closed, will cover anopening 0 formed in the bottom of that portion of the casing which leadsto the chimneyi Q; designates a curved ratchet bar pivoted at Q to a lugupon the cold air check damper and its other end Q forms a handlewhereby the ratchet bar may be utilized for opening or closing thedamperK, the teeth of said bar being designed to engage the marginaledge of the opening 0 to hold the damper'at dili'ere'nt inclinations vNhilelhave shovn hand operated mechanism for regulating the. cold aircheck damper, it will be understood that any suitable form ofthermostatically operated apparatus may be employed but which is notillustrated and which will cause said-damper to be automaticallyoperated. It will also be noted that the pivotal jointed connectionbetween the damper K and its bearings K is such as to allow the damperto be easily removed when desired for the purpose of cleaning-the smokepipe or for other purposes.

, In operation,'it will be understood that the apparatus will at alltimes be in readiness to heat outside atmospheric air preparatory toitsbeing conveyed to the combustion chamber of a furnace, the supplyofair fed being dependent upon the force of the draft through. the casingwith which communication adapted to be had with a chimney. l Vh'en' thefire in a furnace to which the apparatus is adapted to be attached, isfirst started,the gas damper should be open to allow the volatile gasesto pass off, after which the gas damper is thrown to a closed position,the openings H in the swinging edge thereof being ordinarily ofsufficient capacity to allow the incombustiblc portions of the gases topass freely to the chimney in order to keep the fire burning properly.As the atmospheric air is drawn into the compartments of the air heatingchamber and as itcomes into contact with the corrugated surfaces of thechamber, eddies will be formed in the incoming air, thus thoroughlyheating the air by bringing all the particles of the latter intointimate contact with the radiating surfaces of the wall which is heatedby the waste heat passing through the casing. The increasing capacity ofthe air heating chamber will allow for the expansion of the air as itbecomes heated while flowing through chamber and the draft through thecasing will cause the heated air to be drawn through the exitopeningsand into the interior of the chambered portion of the casing and fromwhich it may be drawn by suitable draft to a furnace to aid in thecombustion of the gases. In the event of the pressure of the gasesgenerated in the combustion of the fuel exceeding the normal atmosphericpressure of the cellar or other compartment in which the furnace towhich the apparatiis is adapted to be applied, may be positioned, saidautomatic dampers will close, thus preventing the escape of the gasesthrough the air duct which has been a greatobjection and a danger withair blast furnaees and combustion devices of various kinds.

lVhat I claim to be new is 1. A combustion promoter comprising a casingthrough which smoke and products of combustion from a furnace areadapted to pass, an air heating chamber located therein havingcontracted branching portions leading through the wall of said casingand opening into the atmosphere, said chamber communicating with theinterior of the casing, automatically operateddampers positioned in theinlet ends of said branching portions ofthe chamber and designed toprevent the escape of noxious gases when the pressure of the latterexceeds the normal pressure of the outside atmospheric air, a dampermounted in said casing and provided with openings to allow for the freepassage to the atmosphere of incombustible portions of the gases, and acold air check damper regulating an opening in the bottom of the casing.

2. A combustion promoter comprising a of combustion from a furnace areadapted to pass, an'air heating chamber located therein havingcontracted branching portions leading through the Wall of said casingand opening into the atmosphere, said chamber communicating with theinterior of the casing, automatically operated dampers positioned in theinlet ends of said branching portions of the chamber and designed toprevent the escape of noxious gases when the pressure of the latterexceeds the normal pressure of the outside atmospheric air, a dampermounted in said casing and provided wi'h openings to allow for the freepassage to the atmosphere of incombustible portions of the gases, a coldair check damper pivotally mounted adjacent to an opening in the bottomof the casing, a

ratchet segment pivoted to said check damper and havlng teeth adapted toengage the marginal edge of said opening.

' 3. A combustion promoter comprisinga casing through which smoke andproducts of combustion from a furnace are adapted to pass, an airheating chamber positioned within the latter and having a corrugatedwall and contracted branching orti ons leading through the wall of thecasing and communicating with the atmosphere, an automatically operateddamper positioned in each of said branching portions, said chamberhaving a flaring inner end with series of exit openings, the chamberhaving gradually increasing capacity from its inlet to its outlet endsto allow for the expansion of the heated air. a

y In testimony whereof I hereunto affix my signature in the presence or"two witnesses.

BENJAMIN H. VAN AUKEN.

' Witnesses:

A. L. HoUoH, A. R. FOWLER.

Gopies or this patent may be obtained for five cents each, by addressingthe Commissior-er of Patents,

- Washington, D. O.

